Pet Dog Ultrasonic Stop Bark Training LED Control Trainer Anti Bark Device The product is shipped based on the color or size of the main image of the product page. 100% Brand New and High Quality Feature: Ultrasound design: based on the theory that ultrasound, the dog trainer can effectively train your dogs to be obedient and stop some unwanted behaviors, such as barking, digging, chewing and more, also they are harmless to both humans and pets Multi-functions: except as a pet training tool, it also can prevent you from dog attacks, fit for training many kinds of dogs, such as pets, dogs in police and shepherding, suitable for outdoor work, travel and security night patrol Easy to operate: first open the battery cover and then put 1 piece 9V battery (not included), the sound is audible only to pets, finally turn on the switch and it can work well, also they can serve as a flashlight when necessary Portable and handheld, also convenient for you to carry anywhere you need, such as jogging or walking, cycling, park and so on For optimal results, please use the product as a training aid, along with other tools/commands. Be patient during this